To prepare dough:
In a cup, combine yeast, warm water and 1tsp sugar, stir and set aside. In a large bowl, mix milk, remaining 2/3 cup sugar, melted butter, salt and eggs; stir well and add yeast mixture.

Add half the flour and beat until smooth. Stir in enough of the remaining flour until dough is slightly stiff (dough will be sticky). Turn out onto a well-floured board; knead 5 -10 minutes. Place in well-buttered glass or plastic bowl, cover and let rise in warm place, free from drafts, until doubled in bulk, about 1 to 1 1/2
hours. When doubled, punch down dough and let rest 5 minutes. Roll out on floured
surface into a 15 x 20 inch rectangle.

Roll up jellyroll-fashion and pinch edge together to seal. Cut into 12 slices. Coat bottom of a 13-by-9-inch baking pan and an 8-inch square pan with remaining 1/2 cup melted butter, then sprinkle with remaining 1/4 cup sugar. Place cinnamon roll slices close together in pans. Let rise in warm place until dough is doubled in bulk, about 45 minutes.